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What is the fastest way to compare two sets in Java?
...a boolean, not another Set. The elements in secondSet are actually removed from firstSet and true is returned if a change has been made.
– Richard Corfield
Oct 21 '12 at 20:30
4
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How much is the overhead of smart pointers compared to normal pointers in C++?
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My answer is different from the others and i really wonder if they ever profiled code.
shared_ptr has a significant overhead for creation because of it's memory allocation for the control block (which keeps the ref counter and a pointer list to a...
Calculate the execution time of a method
I have an I/O time-taking method which copies data from a location to another. What's the best and most real way of calculating the execution time? Thread ? Timer ? Stopwatch ? Any other solution? I want the most exact one, and briefest as much as possible.
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Multiple commands on a single line in a Windows batch file
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Use:
echo %time% & dir & echo %time%
This is, from memory, equivalent to the semi-colon separator in bash and other UNIXy shells.
There's also && (or ||) which only executes the second command if the first succeeded (or failed), but the single ampersand & i...
Percentage width in a RelativeLayout
...d set on using a RelativeLayout, you can now use the PercentRelativeLayout from support library version 23.0.0.
– neits
Aug 21 '15 at 12:36
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Python function global variables?
...that I gave, is func_B doing things (1) to the global copy of x (as gotten from func_A), (2) to a local variable x with the same value of the result of func_A, or (3) to a local variable x with no value and (in the eyes of the compiler) no relation to "some value" or the x in func_A?
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Add context path to Spring Boot application
...tically. The reason for the context root is we want the app to be accessed from localhost:port/{app_name} and have all the controller paths append to it.
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Handling specific errors in JavaScript (think exceptions)
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To create custom exceptions, you can inherit from the Error object:
function SpecificError () {
}
SpecificError.prototype = new Error();
// ...
try {
throw new SpecificError;
} catch (e) {
if (e instanceof SpecificError) {
// specific error
} else {
thr...
Can you build dynamic libraries for iOS and load them at runtime?
...u to open the library by passing in the path to that framework, or dylib. From some docs for building jailbreak apps, here's an example of calling an init() function implemented inside your own, separate dylib:
#include <dlfcn.h>
initWrapper() {
char *dylibPath = "/Applications/myapp.ap...
Handle Guzzle exception and get HTTP body
I would like to handle errors from Guzzle when the server returns 4xx and 5xx status codes. I make a request like this:
5 A...